Rowena Ravenclaw – Harry Potter Lexicon

Rowena Ravenclaw was the founder of Ravenclaw House and one of the co-founders of Hogwarts, described as one of “the four greatest witches and wizards of the age” (along with the other three founders) (CS9).

Salazar Slytherin – Harry Potter Lexicon

JKR (website) – Harry Potter Lexicon

Helga Hufflepuff – Harry Potter Lexicon

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